Motor-sled.



Nol 754,996. PATBNTED MAR. 22, 1904.

T. HALLDORSUN.

MOTOR SLED.

APPLIA-TION FILED JUNE 10, 190,3.

N0 MODEL. 2 SHEETS-SHEET 1.

y @uji/Ween@ Q7' "ff,

we nonms Pneus co., wommmpv. msamcnou. b. c.

No MODEL.4

PATENTEDMAR. 22, 1904.

T. HALLDoRsoN.

' MOTOR SLED.

APPLIOATION FILED JUNE 1o, 1903.

2 SHEETS-SHEET 2.-

Patented March 22, 1904.

PATENT OFFICE.

THORGILS HALLDORSON, OF MOUNTAIN, NORTH DAKOTA.

MOTOR-SLED.

SPECIFICATION forming part 0f Letters Pate-111' N0. 754,996, dated March2.2, 1904.

Application filed June 10, 1903. i Serial No. 160,790. (No model.)

To all whom it may concern:

Be it known that I, THORGILs HALLDoRsoN, a citizen of the United States,residing' at Mountain, in the county of Pembina, State of North Dakota,have invented certain new and useful Improvements in Motor-Sleds; and Idoliereby declare the following to be afull, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to motor-sleds; and it has for its object toprovide a construction wherein by rotation of a crank-shaft certainmechanism will be operated t0 propel the sled with a minimum expenditureofy energy.

A further object of the invention is to provide a construction whereinthe propelling mechanism may be raised from operative position when itis desired to draw the sled along.

Other objects and advantages of the invention have reference to detailsof mechanism and will be understood from the followingdescription.

In the drawings forming a portion of this specification, and in whichlike numerals of reference indicate similar parts in the several views,Figure 1 is a side elevation of a sled embodying the present inventionand provided with a crank mechanism from which the propelling apparatusis driven. Fig. 2 is a section taken vertically and longitudinallythrough the central portion of the sled. Fig. 3 is a top plan view ofthe sled with the platform and the mechanism thereon removed, the toprail at one side of the sledframe being broken away to show more clearlythe underlying mechanism. Fig. 4 is a vertical section takentransversely through one side of the sled in advance of theguide-pulleys and showing the latter in elevation.

Referring now to the drawings, the present sled comprises runners 5,having shoes 6, the front ends of which are curved upwardly in the usualmanner and are connected by the transverse brace bar 7, which passesalso through the upwardly-turnedends of the top rails 8 of thesled-frame. Uprights 9 support the rear ends of the rails from therunners,

the lower ends of the uprights being turned laterally and bolted uponthe runners, while the upper ends are provided with eyes through whichis engaged the transverse brace-bar 10, which is engaged also throughthe rails 8. Nuts 11 upon the brace-bars 7 and 10 are adjusted toimpinge against the inner and outer faces of the rails and hold thelatter from sliding on the braces.

To propel the sled, there is employed a mechanism, including acrank-shaft 12, having four cranks 13, 14, 15, and 16, which ispropelled through the medium of a sprocketwheel 17, with which isengaged a chain 18, engaged also with the sprocket-wheel 19 on adriving-shaft 20, mounted in suitable bearings upon the platform 21 ofthe sled, and which latter shaft may be rotated by hand or in any othersuitable manner.

Connected with each of the cranks of the shaft 12 is a propellingmember, which may be termed a leg. Each leg consists of a bar 18, havinga bearing at its forward end, which engages the corresponding crank ofthe shaft 12, the bar including a forward member and a rear member 19',which extends at an obtuse angle to the forward member. The member 19forms the lower side of a guide-frame, the upper side of which is formedby the rod 20', which is attached at its forward end to the front memberof the leg 18 and which portion 20 lies directly above and parallel withthe portion 19 excepting at its rear end, which is bent downwardly andsecured rigidly to the member 19.

At the rear end of the forward member of the leg 18 is a foot consistingof ametal plate 21', the front of which is bent downwardly at rightangles, as shown at 22, to form a calk, while the rear end 23 is bentdownwardlyiri curved shape to form a second calk, the positions of thesecalks being such that the foot may be drawn readily in one directionover the surface on which the sled is to be-.propelled, while movementof the foot in the opposite direction will serve to sink the calks intosaid surface. An additional calk 24 is provided and depends from thefoot between the calks 22 and 23. To connect the foot with the leg 18, aplate 25 is secured upon the foot and is provided. with ears 26, whichreceive the legs between them, and through the ears and the leg ispassed a pivot-bolt 27, so that in the forward movement of the leg thefoot may bedragged freely, while in the rearward movement of the leg,which eects propulsion of the sled, the foot may adjust itself to anyunevenness of the surface.

Upon each of the runners in advance of the upright 9 is an ear 28, towhich is pivoted the forward end of a lever 29, which is slottedlongitudinally and through the slot of which passes the upright or rearsupport 9, this upright preventing lateral displacement of the rear endof the lever. Through the slot of the lever `passes also a brace-rod 30,which is connected at its lower end to the sled-runner and at its upperend has an eye 3l, through which is engaged the brace 7. Upon the rod 30at each side of the sled is disposed a helical spring 32, which restswith its up )er end against the loop of the eye 31 and with its lowerend against the lever 29 and holds the latter yieldably against upwardmovement.

`Disposed transversely upon the slotted lever is a hanger 33 in the formof a metal plate, having its ends at the sides of the lever bentdownwardly and then upwardly to form the U-shaped frames 34, in whichare journaled the guide-rollers 35. The guide-frame of each of thelegsl8 is disposed with its lower member 19' between a roller 35 and thebottom of its U-shaped frame, while the upper side 20 of the guide-framerests upon the roller 35. The hanger 33 at each side of the sled is heldto the corresponding slotted lever by means of a bolt 36, which passesthrough the slot of the lever and through the hanger and aclamping-plate 37 at the opposite sideof the slotted lever from thehanger. This arrangement permits of adjustment of the hangerlongitudinally of the slotted lever to suit different conditions.

It will be understood that, as illustrated, l

each of the hangers has two guide-rollers 35, with which are engaged theguide-frames of a pair of propelling-legs located one at each side ofthe runner at that side of the sled.

The crank-shaft l2 is rotated so that the cranks pass through the lowerarc of their rotation in the rearward movement of the propelling-legsand through the upper arcs during the forward movement of thepropellinglegs. Thus the feet are held down in engaging position duringthe rearward movements and are raised during the forward movements, sothat the front ends of the feet adjacent to which the feet are pivotedare raised, the rear ends of the feet dragging loosely. During themovement of each leg it of course has a shifting pivot formed at thepoint of contact of the guide pulley or wheel 35 and the guideframe ofthe leg, and as the shaft l2 continues to rotate thelegs and therewiththe feet are operated to propel the sled.

When .it is desired to draw the sled, the propelling-feet must be raisedout of active position, and for this purpose levers 40 are pivoted tothe sides 8 of the sled-frame and are connected by means of chains 42 tothe ends of the levers 29. Rack-bars 43 are disposed for engagement bythe levers 40 to hold the latter at different elevations. y

To increase the tensions of the springs 32, so that the feet will bepressed more firmly against the earth when in action, levers 44 arepivoted to the forward portions of the sides.

of the sled, and through these levers arefpassed the rods 30, the levers44 bearing against the i the levers 44 to hold the latter againstupward;

movement.

What is claimed is"- l. The combination with a sled, of a crankshafthaving cranks disposed one at each side of each runner of the sled, alever pivoted upon each runner, a pair of guide-rollers supported byeach of the levers, propelling-legs having guide frames engaged eachwith a guide-roller, each of the legs being connected to a crank of theycrank-shaft, and means for holding each of the levers yieldably withthe connected propelling-legs in active positions.

2. The combination with a sled, of a crankshaft having cranks disposedone at each side of each runner of the sled, a lever pivoted upon eachrunner, a pair of guide-rollers supported by each lever, propelling-legshaving guide-frames engaged each with a roller, each ofthe legs beingconnected to a crank-shaft,

and adjustable means for holding each of the levers yieldably with theconnected propelling-legs in active positions.

3l The combination with a sled, of a crankshaft, a lever pivoted at eachside of the sled, guide-pulleys supported from each lever and adjustablelongitudinally thereof, a plurality of propelling-legs each having aguide-frame engaged with a guide-pulley and having its forward endconnected with a crank-shaft, feet pivoted adjacent to their forwardends to the legs respectively, springs disposed to hold the leversyieldably in lowered positions, pivoted levers engaged with the springsfor adjusting the tensions thereof, means for holding the tension-leversat different points of their adjustments, and lifting-levers connectedwith the first-named levers and adapted to lift and hold them in raisedpositions.

4. The combination with a sled, of a crankshaft, a lever pivoted at eachside of the sled, guide-pulleys supported from each lever and IOO ITO

adjustable longitudinally thereof, a plurality of propelling-legs eachhaving a guide-frame engaged with a guide-pulley and having its forwardend connected with a crank of the crank-shaft, i'ee't pivoted adjacentto their forward ends to the legs respectively, springs disposed to holdthe levers yeldably in lowered positions, and lifting-levers connected

